Here in Lima, Peru & noticed a continuous mild electrical shock from the metal of the laptop, especially when my arm touches the sharp small gouge on the corner edge. This is not new .. I’ve noticed the same thing from my iPhone6+, especially when I have bare feet that are touching the floor & especially when the weather is more damp. I’ve traveled around the world & have experienced it everywhere, whether the cheater adapter is being used, or whether the full 3 prong grounded plug is used – doesn’t matter. Don’t know if this is a widespread problem … let me know your experiences in the comments.You can feel it as a 60 hertz vibration when you lightly run your hand or fingers lightly along th metal surface of the laptop or iPhone, against the metal back, when plugged in to power. It doesn’t matter if you reverse the magnetic clip power plug either – same thing.Video Rating: / 5

I discovered the same issue with both the MacBook and the iPhone. I believe it is the lack of an active ground connection on the Duck Head Plugs. I did bring it to Apple's attention but was told I must have a defective unit?. Amazing that all four of my Apple devices bought over a four year timescale are defective…..wonder what are the statistics on that happening !!!This is how I did the measurements. https://www.youtube.com/watch?v=kfrtDL3tXnU

Yeah, it´s happening with my macbook air. I don´t have to charge it and it doesn`t have any surface damages. I get this if I put my arm (like you did) on the corner of my mac. I don´t notice right away but the sensation increases after a while. It`s like someone is picking at you with a tiny needle

Same problem faced with 2011MacBook Air and iPhone6…do u have a good remedy? I bought a new charging adapter from 3rd party but even when I'm using the original one( which is broken) I felt the electrical statics